Malicious PDF — malware analysis report

Static analysis result for SHA-256 378395a6f098d03a…

MALICIOUS

PDF

82.0 KB Created: 2021-09-09 11:07:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9286b275bfb708b0366472a57ef79141 SHA-1: 04c182636017c8768949f0d0296f5df5c3a37532 SHA-256: 378395a6f098d03aff7e708d3641306cc390f75f59d8a8b19334333f8580a0b2
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF was flagged by ClamAV as a phishing trojan and ML classifiers indicated maliciousness. Heuristics identified it as a link farm with numerous disposable domains, suggesting an attempt to host or redirect to malicious content. The embedded URLs, despite some being marked benign, contribute to the overall suspicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://hooleihomes.com/cms_images/file/kalirefeluvujozoxipeboze.pdf
    • http://yetisirkaucuk.com/firma/files/6046698292.pdf
    • https://southernwashpros.com/nbloom/fckuploads/file/776785941.pdf
    • http://cctsw.net/whly/up_files/FCK/file/20210902_231738_190.pdf
    • http://i-harmonics.com/upload/files/pedipisomu.pdf
    • http://art-wonders.com/ckeditor/ckfinder/core/connector/php/uploads/files/83935159288.pdf
    • http://siamintertrade.com/file_media/file_image/file/77870398005.pdf
    • http://ctmmaximoravenna.com/ckfinder/userfiles/files/92209474542.pdf
    • http://datong-travel.tw/upload/ckeditor/files/20210907211126.pdf
    • http://sweepinstyle.com/userfiles/file/71260613179.pdf
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16130ea5d81420---92336601595.pdf
    • https://sanidom.pl/img/file/73740118729.pdf
    • https://drishtinetcom.in/FCKeditor/file/zozikigap.pdf
    • http://pokebarslo.com/uploads/files/xuzerijivomij.pdf
    • https://betenrealestate.com/sites/default/files/file/tosidonamode.pdf
    • http://niktid.ru/userfiles/file/jirawadivelolubevasemi.pdf
    • https://eletroluz-al.com/_IMG/img_internas/file/wedejatanujilefem.pdf
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1613287a78ddc5---48026349391.pdf
    • http://recit-de-vie.fr/userfiles/file/28560489881.pdf
    • https://showdetango.com/bafa/userfiles/file/61415598077.pdf
    • http://chinazzjx.com/d/files/bupijafatamupefirokofewu.pdf
    • http://thebankcardservice.com/uploads/files/69730858431.pdf
    • https://suacuachuyennghiep.com/uploads/files/sujuzinelebetovejekig.pdf
    • http://zatoodesign.com/userfiles/files/vukevuwemajoxa.pdf
    • http://ikkosushi.com/uploads/files/xivulijabaxojenosajava.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=the+castle+rooms
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df49.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF49 16792 bytes
font_01_sfnt_off0000f760.bin
73fbad2356224743dc358725a296a103a7fdd85e04afcee61e2f289256b44b19		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF760 10260 bytes
font_02_sfnt_off00010e85.bin
7fd07af2b1d69192674b48ba4422101d69d42044b6ceeb4a4a6269dc49b65234		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E85 16852 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.